Posted by Angela on .
Starting from rest, a 11.50 kg suitcase slides 3.18 m down a frictionless ramp inclined at 40° from the floor. The suitcase then slides an additional 5.22 m along the floor before coming to a stop.
(a) Determine the suitcase's speed at the bottom of the ramp.
(b) Determine the coefficient of kinetic friction between the suitcase and the floor.
(c) Determine the change in mechanical energy due to friction.

Physics 
bobpursley,
energy of fall=mgh=bottom KE
mgh=1/2 m v^2
v^2=2g(3.18/sin40
solve for v at bottom. Then
1/2 mv^2=mu*mg*5.22
solve for mu 
Physics 
Angela,
Thank you!!